Yes, they export, and they used to have an eBay store. Their feedback wasn't all that great, but they do have a good reputation in Japan. *Supposedly* the screw-y kind is better than the straight slit one. This would also give you some idea how vendors are charging customers.

They also have real Kuro Raku hachi for about $6 ea. ????ż??
(But the cheapest I have found so far is $1.50 ea.)

They also have terracotta Neofinetia pot, and it is [gasp] only $2.00 ea!????ż??

I asked my friend to order something for me from them, but that is the only connection. I swear.